Improvement in evaporating-pans



H. WOOD. EVAPORATING-PANS.

No. 194,283 Patented Aug. 14,1877.

N.PETERS, PHoTo-umuhmwu. WASHINGTON, ov c."

TTNIT DI i HENRY woo OF'MQNTBEAL, qttsmtrmpi.

IMPROVEMENT IN EVAPORATlNG-PANS.

Specification forming part of Letters Patent No. 194,283, dated August14, 1877; application filed June 5, 1877.

To all whom it may concern:

Be it known that I, HENRY W001), of thecity of Montreal, in the districtof Montreal, and Province of Quebec, Canada, have invented certain newand, useful Improvements in Evaporating Apparatus; and I do herebydeclare that the following is a full, clear, and exact description ofthe same.

The object of my invention is to provide means whereby the processes ofevaporation, concentration, inspissation, or crystallization may be, inthe several manufactures in which they are required, performed moreefficiently and expeditiously than by the apparatus at present in usefor that purpose; a more perfect circulation, and, in consequence, moreeven condensation and thickening of the mass being obtained.

The apparatus which I have invented may be thus briefly described.Within and near the bottom of any suitable vessel are arranged one ormore coils of steam-pipes, from which project upward stand-pipes withclosed ends. Around each one of these stand-pipes is placed a jacket orshield, open at the top, and having apertures formed at its lower end.Withat both ends, to assist in the circulation.

For fuller comprehension of the invention, reference must be had to theannexed drawings, in which-- Figure 1 is a sectional elevation of anevaporating apparatus embodying my invention. Fig. 2 is a plan of thesame; and Figs. 3 and 4 show in detail modifications of the constructionof the standpipes.

Similar letters of reference indicate like parts.

A is the evaporating pan or vessel, of any desired size and shape,either closed or open, and constructed of any usual material, the bottomA being, however, preferably inclined toward the center or outlet B,which may be closed in any suitable manner. Within the vessel, and nearthe bottom, are placed coils G of steampipes, these being eitherseparate, as shown in the drawings, in. which case each coil will beconnected separately with the steam-generator, as shown at G O 0 andhave separate outlets G O for condensed water, or be made in one or morescrolls. Upon this coil are set any number of stand-pipes, D, projectingupward to any height desired, and having stopped ends. Around each. ofthese pipes is arranged a shield, E, open at the top, and having formedat its lower end one or more openings, E, of any suitable size, theconstruction thus described being clearly shown in detail in Fig. 3.

Although this construction will be found a very suitable one in mostcases, it may be adapted to varying circumstances, the lower end of theshield being left completely open, and the shield itself being carriedby bridges or any other device, or the stand-pipes may be made of anysection.

In some cases, as in Fig. 4, the coils 0 may be omitted, and the steambe furnished to the pipes D from a jacket. F, either under or around thevessel. 7

Within each of the pipes D, placed centrally and carried in any usualway, is a small tube, G, taken up within a short distance of the stoppedends of the pipe, and carried down into the coil 0 or jacket F, so as tobe nearly in contact therewith. Down this tube G will, pass the aircontained in the tube before the ingress of steam, the pressure of thewater of condensation not in any way afl'ecting the action of thisair-pipe.

The operation of the invention will be so easily understood that it isonly needful to mention that the material to be treated can enter freelyby the openings E into the space between the stand-pipes D and theshields E, thus affording circulation to the whole mass, keeping it allat one even temperature, and insuring simultaneous crystallization.

The action of the air-tube is to relieve the stand-pipe from the airoriginally contained in it, in such a way as to be absolutely certain inits operation.

Although my invention is primarily intended to be used insugar-refining, its utility is by no means confined to this manufacture,as it may be employed with very great advantage in the processes ofbrewing and distilling, the manufacture of soap, salt, borax, copperas,

and tan-bark extract, and the refining of coal- 2. 'In anevaporating-vessel, the combinaoil, and in all like cases. p ti0n, withthesteam-pipes, of internal tubes G,

Having thus described my invention, What open at top and bottom,substantially as here- I claim is as follows: 1 in set forth.

1. In an evaporating pan or vessel, the combination of the steam-pipeswith shields or Witnesses: V jackets open at both ends, substantially asB. L. HILLES, and for the purpose set forth. H. H; GARG-US.

HENRY W091).

